Popular Science - The self-powered factory

When Tony Ellworth began planning a new San Diego home for his custom-bike company, Ellsworth Bikes, he aimed from the get-go to minimize the project’s impact on both his bank account and the environment. A geothermal system heats and cools the building, and electricity is provided by rooftop solar cells, which feed excess energy back into the local electricity grid to be credited at full retail value.

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